NASA have successfully tested the booster for the world’s most powerful rocket. The two minute burn was the final ground test for the booster they hope will one day blast humanity off to Mars.

The final experiment took place in the Utah desert on Tuesday morning - with NASA allowing the public to watch the proceedings live via the space agency’s webstream.

Some 55 tons of propellant per second were burned by the booster with the goal of producing 3.6 million lb of maximum thrust, equivalent to the power of 14 Boeing 747s at takeoff, according to its manufacturer. In other words, it was one hell of a fire.

A successful test in March heated conditions to +32 degrees Celsius (+90 Fahrenheit), but Tuesday’s two-minute trial used cooler temperatures of +4 degrees Celsius (+40 Fahrenheit) it may encounter on future voyages in the cold reaches of the universe.

NASA aims to launch the second SLS flight with people in five years, saying in a statement that the technology will “achieve human exploration to deep-space destinations, including our journey to Mars.”